Leaves from the plant classified under the species Brassica rapa subsp. pekinensis (Lour.) Kitam., commonly known as Chinese cabbages or Pe-tsai or Pak-tsai or Celery cabbage. The part consumed/analysed is not specified. When relevant, information on the part consumed/analysed has to be reported with additional facet descriptors. In case of data collections related to legislations, the default part consumed/analysed is the one defined in the applicable legislation.